(C) Fetch 1st N Headers of Search Results

Calls Search to get a message set, then downloads the 1st N messages in the message set. There are two equivalent ways of doing it: (1) iterate from 0 to N-1 and download each message individually, or (2) create a new message set that contains the 1st N messages and pass it to FetchHeaders. Both are demonstrated here.

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#include <C_CkImap.h>
#include <C_CkMessageSet.h>
#include <C_CkEmail.h>
#include <C_CkEmailBundle.h>

void ChilkatSample(void)
    {
    HCkImap imap;
    BOOL success;
    HCkMessageSet messageSet;
    BOOL fetchUids;
    int numFound;
    int upperBound;
    int i;
    BOOL bUid;
    HCkEmail email;
    HCkMessageSet firstTen;
    HCkEmailBundle bundle;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    imap = CkImap_Create();

    // Connect to an IMAP server.
    // Use TLS
    CkImap_putSsl(imap,TRUE);
    CkImap_putPort(imap,993);
    success = CkImap_Connect(imap,"imap.someMailServer.com");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imap));
        CkImap_Dispose(imap);
        return;
    }

    // Login
    success = CkImap_Login(imap,"****","****");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imap));
        CkImap_Dispose(imap);
        return;
    }

    // Select an IMAP mailbox
    success = CkImap_SelectMailbox(imap,"Inbox");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imap));
        CkImap_Dispose(imap);
        return;
    }

    // We can choose to fetch UIDs or sequence numbers.
    fetchUids = TRUE;
    // Get the message IDs of all the emails in the mailbox
    messageSet = CkImap_Search(imap,"ALL",fetchUids);
    if (CkImap_getLastMethodSuccess(imap) == FALSE) {
        printf("%s\n",CkImap_lastErrorText(imap));
        CkImap_Dispose(imap);
        return;
    }

    numFound = CkMessageSet_getCount(messageSet);
    if (numFound == 0) {
        printf("No messages found.\n");
        CkMessageSet_Dispose(messageSet);
        CkImap_Dispose(imap);
        return;
    }

    // Get the 1st 10 messages in messageSet.
    upperBound = 10;
    if (numFound < upperBound) {
        upperBound = numFound;
    }

    i = 0;
    bUid = CkMessageSet_getHasUids(messageSet);
    while (i < upperBound) {

        email = CkImap_FetchSingleHeader(imap,CkMessageSet_GetId(messageSet,i),bUid);
        if (CkImap_getLastMethodSuccess(imap) == FALSE) {
            printf("%s\n",CkImap_lastErrorText(imap));
            CkMessageSet_Dispose(messageSet);
            CkImap_Dispose(imap);
            return;

        }
        else {
            // Do whatever is needed with the email.. 
            // ....

            CkEmail_Dispose(email);
        }

        i = i + 1;
    }

    // Alternatively, create a new message set containing the 1st 10 message id's (UID's) 
    // from the search results message set:
    firstTen = CkMessageSet_Create();

    for (i = 0; i <= upperBound - 1; i++) {
        CkMessageSet_InsertId(firstTen,CkMessageSet_GetId(messageSet,i));
    }

    CkMessageSet_Dispose(messageSet);

    // Download the 1st ten headers:

    bundle = CkImap_FetchHeaders(imap,firstTen);
    if (CkImap_getLastMethodSuccess(imap) == FALSE) {
        CkMessageSet_Dispose(firstTen);
        printf("%s\n",CkImap_lastErrorText(imap));
        CkImap_Dispose(imap);
        CkMessageSet_Dispose(firstTen);
        return;
    }

    // Other examples show how to iterate over the emails contained within the bundle...

    // Disconnect from the IMAP server.
    success = CkImap_Disconnect(imap);

    CkMessageSet_Dispose(firstTen);
    CkEmailBundle_Dispose(bundle);


    CkImap_Dispose(imap);
    CkMessageSet_Dispose(firstTen);

    }